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CVE-2026-33637

29
FAUCET Score

Faraday is an HTTP client library abstraction layer that provides a common interface over many adapters. Versions 2.0.0 through 2.14.1 still allow protocol-relative host override when the request target is passed as a URI object (rather than a String) to Faraday::Connection#build_exclusive_url. This bypasses the February 2026 fix for GHSA-33mh-2634-fwr2 and enables off-host request forgery: a request built from a fixed-base Faraday::Connection can be redirected to an attacker-controlled host, forwarding connection-scoped values such as Authorization headers and default query parameters. This issue has been fixed in version 2.14.3.

First published: May 19, 2026Last modified: May 19, 2026

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.0.0, < 2.14.2CPE matchmatch criteria
cpe:2.3:a:faraday_project:faraday:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

0.0NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
0.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.27%
Probability of exploitation in next 30 days
EPSS Percentile
19.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0027 is in the 9th percentile among its peer group of 23,725 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

rubygemspatch availablevia ghsa
Product: faradayFixed in: 2.14.2
github_advisoryvendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

rubygemsGHSA-5rv5-xj5j-3484low

Faraday has a possible incomplete fix for GHSA-33mh-2634-fwr2: protocol-relative URI objects still bypass host scoping

May 18, 2026

References

github.com / advisories/GHSA-33mh-2634-fwr2
Vendor Advisory
github.com / lostisland/faraday/security/advisories/GHSA-5rv5-xj5j-3484
ExploitVendor Advisory